Combination fishing tool and circulating jars



March 2, 1954 w. w. FAR'RAR COMBINATION FISHING TOOL AND CIRCULATING JARS Filed April 12, 1950 ,3 INVENTOR.

WJ/l? W/Zrrar W3 M Adz/Jr 2 Patented Mar. 2, 1954 UNITED STATES PATENT OFFICE COMBINATION FISHING TOOL AND CIRCULATING JARS Willie w. Farrar, Wichita Falls, Tex.

Application April 12, 1950, Serial No. 155,505 g This invention relates to improvements in a combination fishing tool and circulating jars for use with rotary well drilling equipment, and more particularly to the combination of a fishing tool and circulating jars positioned near the bottom of the well in order that heavy solids can be recovered from the drilling mud that cannot normally be circulated to the top of the well.

Various fishing tools and circulating jars have been proposed heretofore, but these have been separate and independent tools and could not successfully be connected together to get the receiving portion of the fishing tool in close proximity to the bottom of the well to receive the heavy solids from the drilling fluid.

An object of the present invention is to provide in combination circulating jars and a fishing tool having a receptacle formed therein whereby the formation and/or foreign matter being drilled up can be acted upon both by rotary and impact action and while this action is being performed drilling fluid is circulated through the well to wash the heavy solids upward a short distance to deposit such heavy solids, such as rock, metallic cuttings and the like into the receptacle of the fishing tool.

Another object of the invention is to provide a junk basket in combination with circulating jars whereby the junk basket maybe readily removed and the drilling jars stem packing equipment replaced to enable the circulating jars to be used without the fishing tool.

Still another object of the invention is to provide the combination of drilling jars and a fishing tool having a receptacle whereby the stem of the circulating jars may be reciprocated through the receptacle without permitting the stem to become wedged within the inner bore of the fishing tool.

In the drilling up of cast iron plugs and other metallic objects within the well, the heavy solids will not move with the drilling fluid unless the drilling fluid moves at such high velocity as to prevent iron or other heavy solids from settling back, which settling of the solids would frequently result in the drill bit or the circulating jars from becoming wedged within the bore hole. The annular space between the wall of the well and the tool presents a restricted cross sectional area which causes an increase velocity over the fluid flowing above the tool, which moves the solids into the receptacle I9. With the circulating jars used in combination withthe fishing tool, an impact can be produced to break up the iron or other heavy solids in such manner that larger piecesmaybe directed intoa-flshing'tool than- 4 Claims. (Cl. 255-27) has been possible heretofore. These larger pieces of solids from the lower portion of the bore hole of the well are entrained within theviscous fluid and are moved upward by the circulation of the drilling fluid to be trapped within the receptacle of the fishing tool, and since the receptacle is removable, it is possible for the debris to be readily removed therefrom.

An embodiment of this invention is illustrated in the accompanying drawingsgin which: v

Fig. 1 is a vertical sectional view through awell showing the combination fishing tool, circulating jars, drill bit and drill stem in elevation, with parts broken away and shown in section to brin out the details of construction;

Fig. 2 is an enlargedelevational view of the fishing tool with parts shown in section;

Fig. 3 is a sectional view taken on the line 33 of Fig. 2, looking in the direction indicated by the arrows;

Fig. 4 is a fragmentary'elevational view of the gland which enables the use of the drilling jars without the fishing tool, and with parts shown in section; and v g p Fig. 5 is a partial section taken substantially at 5-5 Fig. 1, looking in the direction as indicated by the arrows. 7

With more detailed reference to the drawing the numeral l designates the bore hole of awell, with a drill stem 2 positioned therein, and the combination fishing tool and circulating jars generally designated as 8 positioned-on the lower end thereof. The lower end of the circulating jars is adapted to receive a rotary drill bit 4.

For more detailed reference to the circulating jars reference may be had to my prior application Ser. No. 27,775, Circulating Jars, filed May 18, 1948, now abandoned.

A reduced stem 5 is connected to circulating jars and is coupled tothe lower end of the drill stem 2. The stem 5 is adapted to extend through the inner bore 6 of the fishing toolland'through circulating jars 8 to receive a hammer 9 on the lower end thereof.

The hammer =9 has grooves III in the side thereof, which grooves are adapted to engage ribs II which are secured to the inner bore of the casing 12 by welds W, as shown in Figs. 1 and 5 of the circulating jars. The hammer 9 is slidably fitted within the casing l2 between anvils Ma. and 12b of the circulating jars yet so that the grooves l0 interengage with the ribs II to prevent relative turning therebetween. The upper'end of the circulating jars is threadedatlJ .to the anvil l2b which threaded portion is adapted to receive 3 a screw threaded portion l4 on the lower end of the outer barrel I5 of the fishing tool. A transverse wall i6 is spaced upwardly from the lower end of the outer tubular member i5 so as to form a packing receiving chamber to receive packing element [7. The fishing tool I has an inner tubular member 18 spaced inward from outer tubular member I 5 so as to form an annular receptacle 5 9. The upper-ends of the, respective'walls are held in spaced-relation bybars 20 secured to the tubular members (5 and It. The inner bore 6 of the fishing tool is adapted to receive a rubber packing element 2| at the upper .end which packing element is held in place by a rib izinterfitting with a coacting groove in the innerbore' 6 of the tubular member it. .This :paoking l? closes the lower end of the bore l5, therefore the stem 5 is free to slide through"thep'ackingplements H and El without allowing the -entry5of foreign matter into the bore. The upper end of the packing element ii is -.conical.and forms a stripping edge with the-slidable stemlfi which prevents the entrance of .foreignmatter and sand into the inner bore 6, which would cause the sticking of stem 5 and prevent movement thereof. a,

The stem 2 extends aspaced distance above thefishing tool, thereby drillingfluid as pumped down through the drill stem 2 and through'the bit 4 is'discharged up the annulus formed by the fishing tool and circulating jars 3 and the 'wall of the well. Due to thislannulus being of restricted cross sectional area, the velocity of the drilling fluid is relativelyhigh, which will cause the drilling fiuidto .carry heavy solids upward until an enlargedrcross sectional area is reached 1 above the top of the fishing tool. Thus the velocity-of the drilling-fluid willbe reduced and due. tothe turbulence at the top of the fishing .tool,-the heavy solids-will be directed inward and with the drilling fiuid in a more quiescentstate, the-solids will drop :into the annular :receptacle 19. After the desired .amountof drilling has been accomplished the drill stem-Z-maybewithdrawn from the well and the debrisithat has-been .collectedin the receptacle 19 may be removed therefrom.

In order to remove the ,wfishing .tool .a set screw 23 is loosened-and thefishing tool removed from the reduced stem 5. If desired-thefishing tool-may be-dispensed with, and a gland cap .24, having-packingi-S therein substituted there- .for, and withthe-gland 24 screwed in-plac ,-the .set screw zt'may be locked in place.

It is .to be=pointed out that bydmpping the drill-stem suddenly, the hammers will be-eaused I to strike an anvil [2a in the lower end :of the jars to give a sudden jarring action downward. However, the jars are capable ofibcth upward .and downward impact blows. If it"is desired to loosen a wedged tool that has: become Jstuck or wedged in a tight hole due to'swelling otthe1formation-whichconst-ricts the-bore hole or by the caving of the formation from above,--an impact blow of the jars upwardly maybeperformed'by taking --a strain upwardly on the drill stem-f which is then suddenly partially released, which, due to its "weight and the sudden downward movement giventhereto, which will cause the drill stem to stretch, then by sudden application of the brake, the stretcheddrillstein will recoil to cause an upward impact of the hammer .9 against .theanvil [2b of thefiarawhieh will Zloosen the tool. The jarring action .upwardwill 4 upward through the debris, the debris will be deposited within the receptacle Hi.

It will be readily appreciated that the combi nation of a tool of substantially the same diameter from the bit to the top of the fishing tool is necessary to cause the high velocity of the drilling fluid to the top of the fishing tool, whereupon the cross-sectional area greatly increases, which: causesthe heavysolids todrop-into receptacle "wiratherihan to 'be held in suspension in the drilling fluid.

While the invention has been described in one embodiment thereof, it is to be understood that :changes may-be made in the minor details of construction, and adaptations made to different :operatingconditions, without departing from the spirit of the invention as claimed.

Havingthus-clearly shown and described the invention what is claimed as new and desired to secure by Letters Patent is:

.1. .In aufishingtool "for .use with a set of jars on.a,.hollow. rotary drill stem, an-annular-receptacleformed of .an inner and an outer cylinder havingithe annular portion closed near the lower end of said cylinders andopen-at the upper ends thereof, means for .attachably securing the lower endofsaid receptacle to the upper end of said jars, said jars having .a plunger which is adapted topass through said inner cylinder for free reciprecation'therein, andgland meansateach end of saidinnerccylinder for excluding foreign matter from the interior thereof during the reciprocation of said plunger.

2. In a fishing tool for rotary-drilling equipment the combination of a hollow drill stem and circulating jars, which jars have a plunger therein adapted to be :reciprocated, said jars being actuated by said .drili stem, a receptacle formed of inner and outer tubular elements and positioned around said plunger of said circulatingijars, saidiinner tubular element having its lower end spaced upwardly-from the lower end of said outer tubular-element, a-bottomsecured .to' saidtubularelements at the lower end of said .inner, .tubular element, said outer tubular element having its lower inner diameter threaded to receive the upper :threaded 1 end of said .jars, apaoking member interposed between :the upper end ofsaid jars and said'bottom formed in the .lowerendaof saidannularspace-seas to form a seal-therewith and with said plunger-passing therethrough, the upper end of said innertubular element having'a resilient sealing element-positioned between =said'plungerand said inner tubular element so -as to prevent-entrance of foreign matter into saidinner tubular elemenhand lateral elements secured 'to said tubular elements 'near-the'upper ends thereof so asto hold said tubular elementsin spaced relation to permit the entrance of. foreign matter intothe openaend of .an annular spaceformed between saidtubular elements.

r3.=lnafishing -.tcel,-.a tubular casing,=an anvil -mounted in eachendof said casing and each anvil :having a bore formed therein, a tubular stem "extending through one of said anvils into said tubular casing and having a hammer -mountedthereon-between said anvi-ls, a recep- .taclehaving an open-.end, mountedon one of said r7 anvils,.an axial tubularliner mountediwithin said tubular casing and slidably receiving said tubular .stemthereiuandpacking elements between each .end of said-tubular liner and said tubular stem. .4. Inca tool for use witha hollow rotary drill cause ibit jars and fishing tool f tor-move n stern a setot iars having altubulartcasingmeans on said drill stem for connection with said Jars, an anvil mounted in each end of said casing, a bore in one of said anvils, a tubular stem mounted in said bore within said casing for relative, longi tudinal sliding movement, a hammer mounted on said tubular stem intermediate said anvils, a tubular receptacle mounted on the upper end of said casing and surrounding said tubular stem, an axial tubular liner mounted within said receptacle and surrounding said stem, a packer element intermediate said tubular liner and said upper anvil, and a further packing element hav- 6 ing a sharp, conical upper edge surrounding said tubular stem and forming a fluid seal therewith.

WILLIE W. FARRAR.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 478,605 Ireland July 12, 1892 1,519,551 Primmer Dec. 16, 1924 1,656,526 Lincoln Jan. 17, 1928 1,672,464 North June 5, 1928 1,895,610 DelI-Iomme Jan. 31, 1933 2,252,912 Armentrout Aug. 19, 1941 

